CVE-2026-3104
March 25, 2026
A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain.
This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1.
BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
Affected Packages
https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.21.0 <v9.21.20Fix Suggestion:
Update to version v9.21.20https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.20.0 <v9.20.21Fix Suggestion:
Update to version v9.20.21https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.21.0 <v9.21.20Fix Suggestion:
Update to version v9.21.20https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.21.0 <v9.21.20Fix Suggestion:
Update to version v9.21.20https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.20.0 <v9.20.21Fix Suggestion:
Update to version v9.20.21https://gitlab.isc.org/isc-projects/bind9.git (SCM_GIT):
Affected version(s) >=v9.20.0 <v9.20.21Fix Suggestion:
Update to version v9.20.21Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Missing Release of Resource after Effective Lifetime
EPSS
Base Score:
0.03
